/** @file
  Stub implementations for security and anti-detection frameworks.
**/

#include <Uefi.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/DebugLib.h>

// Simple stub type definitions
typedef struct {
  UINTN Context;
} SECURITY_STATE_CONTEXT;

typedef struct {
  UINT8 Key[32];
} DYNAMIC_KEY_CONTEXT;

typedef struct {
  UINTN Level;
} STEALTH_CONTEXT;

typedef struct {
  UINT32  Signature;
  BOOLEAN Enabled;
  UINT32  SpoofingLevel;
  BOOLEAN SpoofiingEnabled;
  BOOLEAN HideVmxSupport;
  BOOLEAN HideHypervisor;
  UINT32  Reserved[2];
} CPUID_SPOOFING_CONFIG;

typedef struct {
  UINT32  Signature;
  BOOLEAN Enabled;
  UINT32  ObfuscationLevel;
  BOOLEAN EnableTimeJitter;
  UINT32  JitterRange;
  BOOLEAN FakeRdtsc;
  UINT32  Reserved[2];
} TIMING_OBFUSCATION_CONFIG;

typedef struct {
  UINT32  Signature;
  BOOLEAN Enabled;
  UINT32  MaskingLevel;
  BOOLEAN MaskMemoryLayout;
  BOOLEAN HideRegisters;
  BOOLEAN MaskCacheTimings;
  UINT32  Reserved[2];
} BEHAVIORAL_MASKING_CONFIG;

typedef struct {
  UINT32 CpuSignature;
  UINT32 CpuSerialNumber;
  UINT32 MainboardSerialHash;
  UINT32 Reserved;
} VTD_HARDWARE_FINGERPRINT;

typedef struct {
  UINT32 Signature;
  UINT32 Version;
  UINT32 Magic;
  UINT32 TotalSize;
  UINT32 AuthType;
  UINT32 Platform;
  UINT64 IssuedTime;
  UINT64 ExpiryTime;
  UINT32 ActivationLimit;
  UINT32 CurrentActivations;
  UINT32 AuthorizationPeriodDays;
  UINT32 Reserved1;
  UINT8  HardwareFingerprint[64];
  UINT8  CompatibilityMatrix[128];
  UINT8  AuthorizationPayload[512];
  UINT8  DigitalSignature[256];
  UINT8  IntegrityHash[64];
  UINT8  AntiTamperSeal[32];
  UINT8  CustomData[1024];
  UINT8  Reserved2[256];
  UINT64 FirstActivation;
  UINT64 LastUsage;
  UINT32 ActivationCount;
  UINT32 UsagePattern;
  UINT32 SecurityLevel;
  UINT32 CryptoVersion;
  UINT64 SecurityFlags;
  UINT32 Checksum;
  UINT64 AuthorizedTime;
  UINT32 MaxUsageCount;
  UINT32 CurrentUsageCount;
  UINT8  EncryptedPayload[64];
  UINT8  RsaSignature[256];
  UINT8  SecurityHash[32];
  UINT8  HwFingerprint[64];
} SVM_AUTHORIZATION_INFO;

EFI_STATUS
InitializeSecurityFramework (
  IN UINTN SecurityLevel,
  IN OUT VOID **SecurityContext
  )
{
  if (SecurityContext == NULL) {
    return EFI_INVALID_PARAMETER;
  }
  *SecurityContext = AllocateZeroPool(sizeof(SECURITY_STATE_CONTEXT));
  if (*SecurityContext == NULL) {
    return EFI_OUT_OF_RESOURCES;
  }
  return EFI_SUCCESS;
}

EFI_STATUS
GenerateDynamicKey (
  IN VOID *SecurityContext,
  IN UINTN KeyPurpose,
  IN OUT DYNAMIC_KEY_CONTEXT *DynamicKey
  )
{
  if (DynamicKey == NULL) {
    return EFI_INVALID_PARAMETER;
  }
  SetMem(DynamicKey->Key, sizeof(DynamicKey->Key), 0xA5);
  return EFI_SUCCESS;
}

EFI_STATUS
RetrieveSecureCredential (
  IN VOID *SecurityContext,
  IN OUT UINT8 *Credential
  )
{
  if (Credential == NULL) {
    return EFI_INVALID_PARAMETER;
  }
  SetMem(Credential, 32, 0xA5);
  return EFI_SUCCESS;
}

EFI_STATUS
DestroySecurityContext (
  IN VOID *SecurityContext
  )
{
  if (SecurityContext != NULL) {
    FreePool(SecurityContext);
  }
  return EFI_SUCCESS;
}

// Note: Anti-detection functions are implemented in MiniVisorAntiDetectionLib
// to avoid linker conflicts. These stubs are kept for compatibility but
// the actual implementations are in the dedicated library.

// Additional stub functions for compatibility
// Note: VtdGenerateHardwareFingerprint and VtdSimpleHash are implemented in MiniVisorDxe.c
// to avoid linker conflicts

// Anti-detection function stubs
EFI_STATUS
InitializeAntiDetection (
  IN OUT STEALTH_CONTEXT **StealthCtx,
  IN UINTN Level
  )
{
  if (StealthCtx == NULL) {
    return EFI_INVALID_PARAMETER;
  }
  
  *StealthCtx = AllocateZeroPool(sizeof(STEALTH_CONTEXT));
  if (*StealthCtx == NULL) {
    return EFI_OUT_OF_RESOURCES;
  }
  
  (*StealthCtx)->Level = Level;
  return EFI_SUCCESS;
}

EFI_STATUS
ConfigureCpuidSpoofing (
  IN STEALTH_CONTEXT *StealthCtx,
  IN CPUID_SPOOFING_CONFIG *Config
  )
{
  if (StealthCtx == NULL || Config == NULL) {
    return EFI_INVALID_PARAMETER;
  }
  
  // Stub implementation
  return EFI_SUCCESS;
}

EFI_STATUS
ConfigureTimingObfuscation (
  IN STEALTH_CONTEXT *StealthCtx,
  IN TIMING_OBFUSCATION_CONFIG *Config
  )
{
  if (StealthCtx == NULL || Config == NULL) {
    return EFI_INVALID_PARAMETER;
  }
  
  // Stub implementation
  return EFI_SUCCESS;
}

EFI_STATUS
ApplyBehavioralMasking (
  IN STEALTH_CONTEXT *StealthCtx
  )
{
  if (StealthCtx == NULL) {
    return EFI_INVALID_PARAMETER;
  }
  
  // Stub implementation
  return EFI_SUCCESS;
}

